Weatherlawyer wrote:

Another long term record that has yet to be explained is that
"evapouration pans" need sunlight -not warmth alone, to cause them to
drop in level. (A data gathering set-up that consists of large bowls
filled to a certain level each day at the same time of day. The amount
of water required to fill them is the measure of how much evapouration
has taken place.)

I've got this one:

The evapouration statistic will show up in the lunar phase cycle as the
O/A differences between 5 and 6.

(Work that one out, arseholes!)